选择单选按钮后，需要更改引导下拉列表中的列表

<input type="radio" name="options" value="option1"> Option 1
<input type="radio" name="options" value="option2"> Option 2
<input type="radio" name="options" value="option3"> Option 3

var radioButtons = document.getElementsByName("options");
for (var i = 0; i < radioButtons.length; i++) {
  radioButtons[i].addEventListener("change", updateDropdown);
}

function updateDropdown() {
  var dropdown = document.getElementById("dropdown");
  dropdown.innerHTML = ""; // 清空下拉列表的选项

  var selectedOption = document.querySelector('input[name="options"]:checked').value;
  if (selectedOption === "option1") {
    // 根据选择的选项1来添加相应的下拉列表选项
    var option1 = document.createElement("option");
    option1.text = "Option 1 - Item 1";
    dropdown.add(option1);

    var option2 = document.createElement("option");
    option2.text = "Option 1 - Item 2";
    dropdown.add(option2);
  } else if (selectedOption === "option2") {
    // 根据选择的选项2来添加相应的下拉列表选项
    var option3 = document.createElement("option");
    option3.text = "Option 2 - Item 1";
    dropdown.add(option3);

    var option4 = document.createElement("option");
    option4.text = "Option 2 - Item 2";
    dropdown.add(option4);
  } else if (selectedOption === "option3") {
    // 根据选择的选项3来添加相应的下拉列表选项
    var option5 = document.createElement("option");
    option5.text = "Option 3 - Item 1";
    dropdown.add(option5);

    var option6 = document.createElement("option");
    option6.text = "Option 3 - Item 2";
    dropdown.add(option6);
  }
}

<select id="dropdown"></select>